A project can contain issues from other owners, but returned items do not include `.content.owner.login`

### Please avoid duplicates

- [x] I checked [all open bugs](https://github.com/gr2m/github-project/issues?q=is%3Aissue+is%3Aopen+label%3Abug) and none of them matched my problem.

### Reproducible test case

_No response_

### Please select the environment(s) that are relevant to your bug report

- [ ] Browsers
- [ ] Node
- [ ] Deno

### Versions

n/a

### What happened?

Today I learned that an issue that was added to a project might belong to a different owner than the project. Given that is possible, we should load the owner login of items by default.

### Would you be interested in contributing a fix?

- [ ] yes